Solar extension cable 3m 6mm² - red/black for reliable PV applications (set)

The solar extension cable set (3 metres, 6mm²) is the ideal solution for short distances within a photovoltaic installation where maximum efficiency and sustainability are paramount. If you need to bridge gaps between your solar modules or make the connection to an inverter or charge controller, this generous cross-section of 6mm² gives you the certainty that not a single watt of power will be lost, even at peak currents.

The set includes two high-quality, double-insulated solar cables: one red cable for the positive pole (+) and one black cable for the negative pole (-). Both ends are professionally pre-assembled with MC4-compatible plugs and sockets. Thanks to the solid cross-section, this set is particularly robust and ideal for modern high-performance modules that often deliver very high currents.

Highlights at a glance

• Maximum efficiency: The 6mm² cross-section minimises electrical resistance to an absolute minimum, which is particularly advantageous at high currents.
• Plug & Play installation: The cables are pre-assembled on both sides with MC4-compatible connectors, so no special crimping tools are required.
• Safe identification: The clear colour coding in red (+) and black (-) effectively prevents incorrect polarity when connecting.
• Weatherproof & Durable: The special jacket made of cross-linked polyolefin is UV-resistant, ozone-resistant and withstands extreme temperatures from -40°C to +90°C.
• IP67 protection class: The plug connections are absolutely dust-tight and protected against splash water and rain when plugged in.
• High-quality conductor: Tinned electrolytic copper ensures excellent corrosion resistance and permanently high conductivity.

Areas of application

This 3-metre extension is designed for a variety of application scenarios:

• Balcony power plants
  • Perfect for bridging the distance between the solar modules and the inverter when it is mounted slightly offset.
• String cabling
  • Bridging gaps between module arrays on pitched roofs or on flat roof elevations.
• Motorhomes & Camping
  • Connecting solar modules to the charge controller in tight spaces where the components are installed in the smallest possible area.

Installation & safety instructions

• No measurable voltage drop
  • At only 3 metres in length, the voltage loss is virtually zero even with 12V systems. This makes the cable the ideal choice for perfectionists who want to use every bit of energy.
• Observe bending radii
  • Despite the high flexibility of the fine-stranded conductors, you should not bend the 6mm² cable too sharply so as not to place mechanical stress on the insulation and connectors.
• Correct locking
  • Make sure you hear the MC4 connectors click into place when you connect them. Only then is the connection permanently watertight and safe from electric arcs.

Features

FAQs about the solar extension cable 3m 6mm²

Isn't 6mm² oversized for just 3 metres in length?

Technically yes, but it offers reserves. While 4mm² is generally sufficient for this length, 6mm² offers increased mechanical robustness and is already ideally suited for future module generations with currents above 15A.

Will the plugs fit my inverter from Hoymiles or Deye?

Yes. The installed connectors conform to the MC4 standard, which is used worldwide in almost all solar modules and microinverters. They fit perfectly both mechanically and electrically.

Can I also leave these cables outside?